Here is a new Autool SPT360 five hole spark plug tester automotive diagnostic unit.
5-Hole Spark Plug Tester 110V Car Motorcycle Ignition Spark Performance Analyzer
New Car Spark Plug Tester Ignition Testers, 2~5 Hole Spark Plug Analyzer
Adjustable 5-Hole Spark Plug Tester for 12V Vehicles & Motorcycles, Digital RPM
Adjustable 5-Hole Spark Plug Tester, Digital RPM 200-9999, Engine Ignition Coil